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Large bright stars that are fairly cool are called?
Red giants.
Majority of stars are small cool type-M stars?
Correct. M-type stars on the main sequence are called red dwarfs.
Is a red giant an old dense cool star?
A red giant [See related question] is the final part in a stars main sequence [See related question] life. It is old but not very dense nor cool but certainly cooler than when it was a main sequence star.
If red giants are cool stars why are they so bright?
Red giant stars emit less light per square meter of surface area than smaller, hotter stars, but their larger size means they have a larger surface area from which to emit light, so they emit more light overall.
What are the large cool stars that are not in the main sequence?
Large cool stars that are not in the main sequence are known as "red giants" or "red supergiants." These stars have exhausted the hydrogen fuel in their cores, causing their inner regions to contract while the outer layers expand. As a result, they become larger and cooler than when they were on the main sequence. Red giants are typically found in the later stages of stellar evolution, after they have exhausted their core hydrogen and started fusing helium in a shell around the core. They are often reddish in colordue to their lower surface temperature compared to main sequence stars. Red supergiants are even more massive and larger than red giants, representing the final stages of the life cycle of massive stars before they undergo supernova explosions or other dramatic events.
What stars are very bright and very cool?
the ones in the sky
Large bright stars that are fairly cool are called?
Red giants.
Where on the Main Sequence are stars cool and dim?
None of them are cool and dim; the one in the white/black dwarfs are cool and dim.
What stars are cool and bright stars?
To be bright you need to be hot, close or have a large surface area. The brightest coolest stars are red super giants. They have such a large surface area, that even though their surface temperature is cool - in star terms - their large surface area makes them appear bright.
Majority of stars are small cool type-M stars?
Correct. M-type stars on the main sequence are called red dwarfs.
What are the very bright starts in the upper right of an h-r diagram called?
Hot stars are found in the left hand side of the diagram, cool stars the right, bright stars at the top, and lastly the faint stars are located at the bottom.
Are big stars cold?
No. All stars are hot. For stars on the main sequence, the largest it is, the hotter it is. When a star leaves the main sequence to become a giant or supergiant it will cool down, but will remain hot enough to glow brightly.
What part of the modern H-R diagram do cool bright red stars appear?
top,right
What is the name of a class of small cool main sequence stars?
A red dwarf star. See related question.
What are the seven types of main sequence stars in the universe?
The seven types of main sequence stars in the universe are O (blue and hot), B (white-blue and hot), A (white and hot), F (yellow-white and medium), G (yellow and medium), K (orange and cool), and M (red and cool).
Type of stars in the H-R diagram?
The HR diagram has the star's temperature along the horizontal axis and the absolute magnitude (brightness) along the vertical axis. Each star is represented by a single dot. Higher temperature is usually associated with more brightness so many stars lie on or near a line on the diagram called the Main Sequence. Red giant stars are found on the upper right hand quarter because they are relatively cool but still very bright.
What type of stars has low temperature but high luminosity?
The red giants like Betelgeuse and Antares are bright and - relatively - cool.
